Using a "Straight" cable when a "Null Modem" (crossed) cable is required.
Tip: If uncertain, swap TX and RX.
: After clicking "Start" in the software, you must restart or power on the decoder immediately. If the tool remains stuck on "Wait," the handshake failed. Bootrom Error Wait For Get Please Check Stb Uart Receive
The BootROM waits only ~300ms for a handshake. If the PC software sends the initial sync bytes too late (e.g., because of USB latency or heavy CPU load), the SoC assumes no host and tries to boot from flash. Using a "Straight" cable when a "Null Modem"